Healdsburg Historic Weather Records

Analyse hottest, coldest, windiest & wettest days

Healdsburg Weather Trend Graph


Temperature (°C)
.
Months
Max Temp.
Historic Max Temp.
Min Temp.
Historic Min Temp.

Yearly Summary 2026


44°C
Highest Temp
11 Jun. 26

0°C
Lowest Temp
29 Jan. 26


Seasonal Breakdown

Hottest MonthJuly35.31°C

Coldest MonthJanuary7.11°C

Wettest MonthJanuary10.87mm

Windiest MonthJune15.01km/h

Frequently Asked Questions


1. What is the hottest month in Healdsburg historically?

July is historically Healdsburg's hottest month, with average maximum temperatures around 31°C. During peak heatwave events, the highest recorded temperatures have reached 46°C on 2022-09-06.

2. What is the coldest month in Healdsburg historically?

January is Healdsburg's coldest month, with average minimum temperatures around 5°C. The all-time record low of -3°C was recorded on 2011-02-26.

3. What is the average annual rainfall in Healdsburg over the past 17 years?

Healdsburg's average annual rainfall is approximately 921.9mm, based on records spanning 17 years.

4. How many rainy days does Healdsburg experience on average per year?

Healdsburg historically records approximately 80.1 rainy days per year. December has the highest number of rain days at an average of 12.9 days.

5. What is the all-time highest temperature ever recorded in Healdsburg?

The all-time highest temperature recorded in Healdsburg is 46°C on 2022-09-06.

6. What is the all-time lowest temperature ever recorded in Healdsburg?

The all-time lowest temperature recorded in Healdsburg is -3°C on 2011-02-26.

7. What is the windiest time of year in Healdsburg historically?

Healdsburg experiences its strongest winds during May. The historic gust record of 37.8 kph was recorded on 2025-12-25.

8. What is the highest and lowest humidity in Healdsburg during a year?

Usually, Healdsburg's humidity peaks in March at around 75.8% and drops to its lowest in September at approximately 55.8%.